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Expired Canadian patentCanada

Camshaft damper

CA 1306623 C · Owner: Ferguson, Robert J. · Inventors: Ferguson, Robert J.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A camshaft damper system for damping torsional vibrations within a camshaft for an internal combustion engine. The drive sprocket attached to the end of a camshaft includes radial projections and recesses meshing with the flexible camshaft drive belt or chain and the sprocket includes torsional vibration damping means in the form of an annular inertia ring and elastomeric member attaching the inertia ring to the sprocket wherein torsional vibrations are absorbed by the elastomeric material reducing wear on the camshaft and the camshaftrelated components.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 10, 1987
GrantedAugust 25, 1992
Term endedAugust 25, 2009
Patent numberCA 1306623 C
Classification (IPC)F16F15/12 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 10, 1987Patent grantedAug 25, 1992Term endedAug 25, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.